about summary refs log tree commit diff
path: root/sysdeps/x86_64/fpu/multiarch/ifunc-mathvec-avx512.h
blob: 5f8326503bce222aa4f051e5ea33d85d43efecd7 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
/* Common definition for libmathvec ifunc selections optimized with
   AVX512.
   Copyright (C) 2017-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <init-arch.h>

#undef PASTER2
#define PASTER2(x,y)	x##_##y

extern void REDIRECT_NAME (void);
extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_wrapper) attribute_hidden;
extern __typeof (REDIRECT_NAME) OPTIMIZE (knl) attribute_hidden;
extern __typeof (REDIRECT_NAME) OPTIMIZE (skx) attribute_hidden;

static inline void *
IFUNC_SELECTOR (void)
{
  const struct cpu_features* cpu_features = __get_cpu_features ();

  if (!CPU_FEATURES_ARCH_P (cpu_features, MathVec_Prefer_No_AVX512))
    {
      if (CPU_FEATURE_USABLE_P (cpu_features, AVX512DQ))
	return OPTIMIZE (skx);

      if (CPU_FEATURE_USABLE_P (cpu_features, AVX512F))
	return OPTIMIZE (knl);
    }

  return OPTIMIZE (avx2_wrapper);
}